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<H1>IBM Visualization Data Explorer Programmer&#39;s Reference</H1>
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<H3><A NAME="HDRDXSGTV" HREF="progu097.htm#PToC_409">DXSetGroupType,
DXSetGroupTypeV</A></H3>
<A NAME="IDX2078"></A>
<A NAME="IDX2079"></A>
<A NAME="IDX2080"></A>
<A NAME="IDX2081"></A>
<P><STRONG>Function</STRONG>
<P>
Associate a type with a Group.
<P><STRONG>Syntax</STRONG>
<BR>
<TT><STRONG><BR>
&#35;include &lt;dx/dx.h&gt;<BR>
<P><BR>
Group DXSetGroupType(Group g, Type t, Category c, int rank, ...)<BR>
Group DXSetGroupTypeV(Group g, Type t, Category c, int rank, int *shape)<BR>
</STRONG></TT><BR>
<P><STRONG>Functional Details</STRONG>
<P>
Associate a type <TT><STRONG>t</STRONG></TT>,
category <TT><STRONG>c</STRONG></TT>,
<TT><STRONG>rank</STRONG></TT>, and
<TT><STRONG>shape</STRONG></TT>,
(hereafter referred to
as simply type),
with
Group <TT><STRONG>g</STRONG></TT>.  When the Group type is
set, all current members are checked for type, and all members added
subsequently are checked for type.  The type of a Group may be
retrieved by
<TT><STRONG>DXGetType</STRONG></TT>.
<P>
The type is one of the following:
<PRE><STRONG>
TYPE_BYTE            TYPE_HYPER        TYPE_SHORT
TYPE_UBYTE           TYPE_INT          TYPE_USHORT
TYPE_DOUBLE          TYPE_UINT         TYPE_STRING
TYPE_FLOAT
</STRONG>
</PRE>
<P>
The category is either <TT><STRONG>CATEGORY_REAL</STRONG></TT> or
<TT><STRONG>CATEGORY_COMPLEX</STRONG></TT>.
<P>
Array Objects are always typed.  Fields are typed if they contain
a "data" component; their type is the same as that of the
"data" component.  Series, MultiGrids, and Composite Fields are
typed if they contain typed Fields.  <TT><STRONG>DXSetGroupType</STRONG></TT>
may be used to explicitly type
generic Groups.  If typed, all Fields contained in the Group must match
the type.  Other
Objects do not contain type information.
<TT><STRONG>DXSetGroupType</STRONG></TT>
needs to be used if the member
Fields are manipulated so that the type of their "data"
components, and therefore the Field type, changes.
<P><STRONG>Return Value</STRONG>
<P>
Returns <TT><STRONG>g</STRONG></TT> or returns <TT><STRONG>NULL</STRONG></TT>
and
sets an error code.
<P><STRONG>See Also</STRONG>
<P>
<TT><STRONG>
<A HREF="progu252.htm#HDRDXNG">DXNewGroup</A>,
<A HREF="progu311.htm#HDRDXSEM">DXSetEnumeratedMember</A>,
<A HREF="progu317.htm#HDRDXSM">DXSetMember</A>
</STRONG></TT>
<P>
<A HREF="progu045.htm#HDRMBS">"Generic Operations"</A>.
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